Cable grip



J. MARTINS'ON.

CABLE GRIP.

APPLICATION man APR. a. 192i.

1 ,40 5 307 Patented J an. 31, 1922.

JQ I iunnrINso or'iiuiiurn, ivrrNNnsorraf Application filed April 8, 1921. s'eri 1 No.45e,554;-'

T all'whom'itmay concern connection with the anchor line of a stump Be it known that 1-, JOHN MARTINsoN, citizen of the United States," residing at Duluth, in the county of St. Louis and State of Minnesota have invented certain new and useful Improvements in Gable Grips,; of which the following is aspecification, refer} ence beinghad therein to the accompanying drawing. 5 I

This invention relates to cable grips and has special reference to suclra device used in pulling machine wherein it becomes frequently desirable to adjust the length of such line.

Y VI am' aware that cable grips of this character and of much the-same mechanical combinatlon are old, but my present invention more particularly residesun a locking attachment for grips "of this character, the

principal object being'to provide simple means whereby" thegrip is automatically 7 held in-its open adjustablei position when viewed-from the side opposite to that of the the length of the-cable is being regulated.

Other objects and advantages will appear in the further description of the invention. Referring 'to the accompanying drawing forming part of thisapplication and in passing therethrough which like reference characters indicate like parts Figure 1 is aside elevation of a cable'grip" with my improved lock attached thereto;

Figure 2 is an end elevation of the holding jaws of the grip f Figure 3c is an elevation of Figure '1 holding jaws; and a} j v v Figure 43s ail-elevation of the detached lockingmember,

1 represents the normally stationary main body portion of the grip which comprises a metal bar having a hole 2 in one extreme end into which is'to be attached a line or cable by which the grip "is made -fast to a stump or anchor of any available character forholding the grip in stationary position. Adjacent the opposite end of the body portion 1 are two spaced holes in which are pivotally mounted bars or links, one pair of I which is designated by the numerals 3 and the other pair by the numeral 4: each pair being, as before stated, pivotally attached to the bar 1 at the points 5 and 6 respectively.

These links normally extend at right angles to the body bar 1 and pivotally carry CABLE earl}. H

Specification of Letters Patent. Patented v anchor line becomes essential,

Jan. 31,5;1922' intermediate of their free' endsthe two gripping jaws? and v8, thesejaws being spaced apart and having concaved opposed faces as illustrated at 9, intermediate of which the cableIwhich leads to the stump puller or other like device is engagedjandjitbeing well knownto' those versedin :the 'a'rtof manipulating such devicesthat under or- 'dinary circumstances when a pulling cable r is thus installed intermmediate-ofthe jaws V 7 and 8 and a stress applied thereto when thebody portion'l is securely anchored the'" jackknifing' effect of the pivotally united.

portions of the grip will cause the jaws 7 and 8 to forcibly impinge'the cable and hold it securely against slipping. Under these circumstances when it is desired to-release the hold'of this form of grip it becomes necessary tore-adjust the relative'position of the pivotal portion of the grip so that the jaws will be slightly separated and "release their hold uponthe pulling cable,

when, if it is sod e'sired-j the, pulling cable maybe-drawn through the jaws either to be whollyreleased therefrom or if drawn to-" wards the anchor whenstill attached-"to the puller maybe thus shortened for z't subse- 'quent pullas for example when aftenthe first pulling stresshas been accomplished andthe tackle of the stump'puller ha's'become fshortened in relation tojfthe' subject being pulled that such shortening of the Now in the folding together' of m'it the links 3"to' assume onlya posit-ion at substantially right angles to the link 1 during-"the act of foldii'igtogether of theo -grip, and,lwhile' the links are inthis relative po-' sition to the -arm"1the'-jaws7 and 8 are" in] their maximum spaced relation; to j each other. H v I I 1 p p A pivotal pin 11 is installed through the links 33 centrally thereof, and spaced awayf from the inner edge of the arm 1.

the grip for releasing the hold'upon the p ullingline. I have provided means whereby such fold ing action is limited inthat shoulders 10 are provided on either side ofthe body arm 1 adjacent the upper'edges ofthe'liiiks 3" and which shoulders are so formed as to per? Upon this pin is .pivotallymounted the pawl orstop 12, it being aflat elongated strip of" metal having two spaced ears.13--13v. pro-" jectingsubstantially at right angles from one face thereof through which are suitable holes for mounting upon the pin 11. This s pawlis of a width to just loosely lit in intermediate of the links 8 and is made of alength so that the lower end projects downwardly intermediate of the links 1 whereit is designed to cooperatively engage under suitable circumstances a notch 1 1 in the lower inner edge of the arm 1 and adjacent the pivotal connection 6 of the linked, the upper end 15 of the pawl extending outwardly beyond the outermost edges of the links 8 where it may be manually manipulated for adjusting purposes. 7

A second pin 16, similar to the pin 11, is installed through the links33 and spaced somewhat away from the latter and about. this pin is installed one end of a flat spring 17, which, intermediate of its ends, is wound about the pin 11 and extends downwardly with its free end engaging the back of the pawl 12-for holding the lower end of the latter at all times tightly against the inner edge of the body arm 1 for automatic engagement within the notch 1 1 when the adjustment of the grip permits of such. The relations of the pawl with the notch 14- are such that this engagement takes place when the links 3. and l are disposed substantially at right angles to the body arm 1, as illustrated in Figure 1 of the drawings. 1

When the pawl 12 is thus engaged within the notch 1%- it is evident that the grip will not function as the jaws 7' and 8 are thus held in their maximum spacedpositionnotforcibly engaging the pulling cable, and, being thus held, permits of free adjustment of the pulling cable intermediate of the jaws 7 p and 8. v

The object of the gripping aws being thus held is readily discernible when itis consid ered .how that it is frequently desired to shorten the length of the pulling line intermediate of the grip and the pulling device,

as an operator stepping behind the grip and grasping the bite of the pulling llne after the latter has been, slacked away from the machine and. the act of pulling towards the anchor will tend to fold the grip to the position shown in Figure 1 of the drawing when the pawl will automatically become engaged within the notch 1d and thus hold the grip initsopen position for the free and unobstruct-.

ed adjustment of the line,while in deviceso-f this character, asbefore stated, not being provided with this automatlc holdmg device,

it becomes very awkward and inconvenient of adjustment under these circumstances.

After the desired adjusting or shortening of the pulling line has been accomplished all that is necessary to do to permit of the grip properly functioning is to manually release the pawl by pressing inwardly upon the free projecting end 15 thereof, thus counteracti11 the influence of the s rin 17 which will.

portion, of a manually adjustable pawl carried by said grip for automatically holding the grip inreleased position, substantially as described. j

2. A cable grip of the character described comprising a mainbodyportion to one end of which a stationary anchor line may be attached, spaced bars or jaw holding links piva otally mounted on the body portion, shoulders on the body portion to prevent the links from closing inwardly towards thebody portion beyond substantially right angles there: to, and manually adjustable means forauto- 'iatically holding the links in such relative position to the body portion for the purpose described. p r v v A cable grip of the character described comprising amain body portion'to one end of which. a stationary anchor line. may be at:

tached, spaced bars or jaw holding links pivotally mounted ,on' thegbodyportion, shoulders on the body portion to preventthe links from closing inwardly towards the bodyportion beyond substantially right .anglestherer to, and a spring operated manually. adjustable'pawl carried by the links forl cooperative engagement with the body portion, sub-' stantially as and for the-tpurpose'described. In testimony whereof I hereunto aftlx' my signature in the presence oftwo witnesses. JOHN MARTINSON. Witnesses: r S. C. Bnonson,

S. Gno; Srnvnns. I 

